Identify which name in each of the following pairs is a legitimate MATLAB variable name: Test your answers by using isvarname-for example, isvarname fred Remember, isvarname returns a 1 if the name is valid and a 0 if it is not. Although it is possible to reassign a function name as a variable name, doing so is not a good idea. Use which to check whether the preceding names are function names-for example, which sin In what case would MATLAB tell you that sin is a variable name, not a function name